Another sendmail relaying problem.

[Franco]

Hi, in the /etc/mail/access i have nothing
this is all relay blocked.
But if someone send an e-mail to a local user and
in his from address put other local user e-mail it
relay without problem.


Douglas Furlong ha scritto:
> On Fri, 2004-06-25 at 19:22 +0200, Franco wrote:
> 
>>Hi, i say that someone is able to bounce a message through my
>>server to local user, it can use the server smtp to delivery
>>to local user but the mail from must be any local user.
>>
>>Example: on my server i have 20 local users, one of this
>>is pippo at ppppp.com, someone send e-mail through my server using
>>my server smtp and in the from address of e-mail put pippo at ppppp.com
>>it send the e-mail without problem.
>>So all who want do spamming on my local user can do this.
>>How can stop it?
> 
> It would be very helpful if you included the details from you /etc/mail/
> access file in a post to the list.
> 
> The standard configuration for sendmail prevents it from doing as you
> suggest, this means you must have changed some thing (most likely in /
> etc/mail/access), if you can tell us what you changed, and what you want
> your mail server to do, then we will most likely be able to help you
> resolve the problem.
> 
> Doug
> 
>